#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
inline ll read(){
    ll xx=0;short flag=1;char ch=getchar();
    while(ch<'0'||ch>'9'){
        if(ch=='-')flag=-1;
        ch=getchar();
    }
    while('0'<=ch&&ch<='9'){
        xx=(xx<<3)+(xx<<1)+ch-'0';
        ch=getchar();
    }
    return xx*flag;
}
int main(){
    freopen("arena.in","r",stdin);
    freopen("arena.out","w",stdout);
    
    
    return 0;
}